RA Classification Criteria 2010 ACR/EULAR Classification Criteria for Rheumatoid Arthritis Joint Involvement 1 large joint (0)2-10 large joints (1)1-3 small joints (2)4-10 small joints (3)>10 joints (at least 1 small joint) (5) Serology (RF & Anti-CCP) Negative RF and negative Anti-CCP (0)Low positive RF or low positive Anti-CCP (2)High positive RF or high positive Anti-CCP (3) Acute-Phase Reactants (CRP & ESR) Normal CRP and normal ESR (0)Abnormal CRP or abnormal ESR (1) Duration of Symptoms < 6 weeks (0)> 6 weeks (1) Calculate Score Patient Score: 0